Update changelog for v5.6.0

Author: JonasAlfredsson

docs/changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+### 5.6.0
+- Added gandi DNS authenticator.
+  - PR by [@benedicteb][58]
+
 ### 5.5.0
 - Added [namecheap][56] DNS authenticator.
 - Added [godaddy][57] DNS authenticator.
@@ -450,3 +454,4 @@
 [55]: https://github.com/JonasAlfredsson/docker-nginx-certbot/pull/307
 [56]: https://github.com/JonasAlfredsson/docker-nginx-certbot/issues/313
 [57]: https://github.com/JonasAlfredsson/docker-nginx-certbot/issues/320
+[58]: https://github.com/JonasAlfredsson/docker-nginx-certbot/pull/327

docs/dockerhub_tags.md

@@ -17,7 +17,8 @@ are updated.
 
 | Major | Minor | Patch | Nginx              |
 | ----: | ----: | ----: | :----------------- |
-| 5     | 5.5   | 5.5.0 | 5.5.0-nginx1.27.5  |
+| 5     | 5.6   | 5.6.0 | 5.6.0-nginx1.27.5  |
+|       | 5.5   | 5.5.0 | 5.5.0-nginx1.27.5  |
 |       | 5.4   | 5.4.1 | 5.4.1-nginx1.27.5  |
 |       |       |       | 5.4.1-nginx1.27.4  |
 |       |       | 5.4.0 | 5.4.0-nginx1.27.4  |